Rad-97 Service Manual Chapter 5: Performance Verification Procedures
Masimo Corporation 62 www.masimo.com
Nurse Call Test
To conduct a Nurse Call test
1. Disconnect any patient cables, sensors, or accessories from the Rad-97.
2. Turn the Rad-97 Off and On again. Ensure that there are no audible alarms or audible alarms that are not paused.
3. Verify the Nurse Call polarity is set to normal. See Device Output.
4. Prepare a digital multi-meter to measure resistance.
5. Connect a 1/4" Nurse Call interconnection cable phone plug (2-circuit or 3-circuit) into the Nurse Call port of the Rad-97. See Back View.
6. Connect the common lead of a digital multi-meter to contact 2 of the of the Nurse Call interconnection cable phone plug (as shown in the table).
7. Connect the positive lead of the digital multi-meter to contact 1 of the of Nurse Call interconnection cable phone plug (as shown in the table). Verify that the
resistance is as shown in the table.
8. Trigger an alarm on the Rad-97 (for example, by connecting and disconnecting a sensor while measuring data). Verify that the resistance is as shown in the
table.
9. If using a 3 circuit Nurse Call interconnection cable phone plug, change the positive lead of the digital multi-meter to contact 3 of the of the phone plug (as shown
in the table). Verify that the resistance is as shown in the table.
10. Trigger an alarm on the Rad-97. Verify that the resistance is as shown in the table.
Nurse Call Cable Type Nurse Call Contact State Multi-Meter Reading
2-Circuit
1 and 2 contacts normally opened OL (open circuit)
1 and 2 contacts nurse call triggered < 25 ohms
3-Circuit
1 and 2 contacts normally opened OL (open circuit)
1 and 2 contacts nurse call triggered < 25 ohms
2 and 3 contacts normally closed < 25 ohms
2 and 3 contacts nurse call triggered OL (open circuit)
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